(19)
(11) EP 0 452 283 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.03.1992 Bulletin 1992/12

(43) Date of publication A2:
16.10.1991 Bulletin 1991/42

(21) Application number: 91830141.7

(22) Date of filing: 10.04.1991
(51) International Patent Classification (IPC)5: G01J 9/02
(84) Designated Contracting States:
BE CH DE FR GB LI NL

(30) Priority: 13.04.1990 IT 936790

(71) Applicant: Officine Galileo S.p.A.
I-50013 Campi Bisenzio Firenze (IT)

(72) Inventor:
  • Lapucci, Antonio
    I-50136 Firenze (IT)

(74) Representative: Mannucci, Gianfranco, Dott.-Ing. et al
Ufficio Tecnico Ing. A. Mannucci Via della Scala 4
I-50123 Firenze
I-50123 Firenze (IT)


(56) References cited: : 
   
       


    (54) Coded-fringe interferometric method and device for wavefront detection in optics


    (57) For the detection of the wavefront of a beam, based on a Mach-Zehnder interferometric configuration, synchronous detection - which replaces a temporal scan or a spatial dimension of the array of sensors - is obtained by means of frequency coding of the fringes present in the function I(x,y).






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